package lq.book.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginFilter implements Filter {

	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException 
			{
		// TODO Auto-generated method stub
		HttpServletRequest req=(HttpServletRequest)request;
		HttpServletResponse res=(HttpServletResponse)response;
		  if(req.getSession().getAttribute("user")!=null)
		  {
			chain.doFilter(req, res);
			  
		  }
		  else
		  {
                  res.sendRedirect("Login.jsp");
			  
		  }

	}

	public void destroy() {
		// TODO Auto-generated method stub

	}

}
